Luis Diaz owns a bar in Barcelona, where he's appealing to a specific clientele. Upstairs, once a week, he turns his bar into a Copla club -- a place where people nostalgic for a bygone era can gather and appreciate a long-ago departed musical style.

In a working class bar in downtown Barcelona, each Saturday night, a mostly elderly audience gets transported back in time, to the glory days of the copla, and other forms of romantic Spanish popular music.

In a working class bar in downtown Barcelona, each Saturday night, a mostly elderly audience gets transported back in time, to the glory days of the copla, and other forms of romantic Spanish popular music.

Luis Diaz owns a bar in Barcelona, where he's appealing to a specific clientele. Upstairs, once a week, he turns his bar into a Copla club -- a place where people nostalgic for a bygone era can gather and appreciate a long-ago departed musical style.